Comment 11 for bug 834386

Mika, you say that you want the indicators to move to the left only once Unity has full RTL support, but as I've said last month, the indicators are already to the left in the current released version of the greeter. Unity greeter uses a Gtk menu bar for the panel, and Gtk has automatic mirroring. It is the current state is incompatible.
If the alignment with the desktop meme is that important, I suggest disabling the current mirroring of the panel in the greeter, and leaving everything else the way it is.
Note that the mirroring code for unity-2d has already been released (see bug #654988), although they said that the code will remain disabled until Oneiric is released.